Threshold Solids. World's First Performance Sport Modular Helmet. Purebred for the street has been ICON's mantra since day one, and it's the reason they created the Threshold helmet. Built for riders who demand versatility without compromise, it blends a sleek, aerodynamic shell with a positive locking modular chinbar for quick conversations, fuel stops, or just catching a breath. Its handcrafted FRP shell meets world safety standards, while oversized intakes and exhaust ports channel air through a deeply sculpted EPS for maximum cooling. The Fog-Free Threshold Dropshield™ knocks down sun and glare in an instant, and the quick-change fog and distortion free Threshold Shield™ keeps your vision razor sharp. Inside, the Hydradry™ comfort liner wicks away moisture. The Threshold Helmet is engineered from the asphalt up, for the streets where ICON lives and breathes. Intermediate-Oval headform.